#ifndef soundex_h
#define soundex_h

#define SOUNDEX_LENGTH 4
// Ham bam soundex
// Dau vao: 1 chuoi bat ki
// Dau ra: ma bam(4 ki tu) tuong ung
char* soundex(char* word);

// Chong ham soundex
void soundex(char* word,char* hashCode);

// Ham lay chu so tuong ung voi ki tu
// Input : character
// Ouput : digit
int getCharDigit(char c);

#endif